CANON - Canon EF 400mm f28L USM Parts

Complete and detailed parts catalog for the Canon EF 400mm 1:2.8 L USM lens (ref. C21-8282). This technical reference document provides comprehensive documentation essential for maintenance technicians and specialized optical equipment repair professionals. The catalog delivers a comprehensive visual description of the lens featuring detailed exploded-view diagrams illustrating each component and subassembly throughout the optical system. Pages 1-4 contain precise technical illustrations of optical elements (lenses G1 through G10), focusing mechanisms, barrel systems, mounts, and electronic connection components. The parts list (pages 5-7) catalogs over 150 individual components with official Canon reference numbers, classifications (primarily classes D and E), and required quantities. Coverage encompasses optical lenses, adjustment rings, springs, electrical contacts, connectors, various screw types, sealing gaskets, tripod mounts, and specialized electronic units. The documentation also includes a detailed cross-sectional optical diagram (page 9) and a comprehensive catalog of Canon accessories, notably the ET-161B and ET-161B II lens hoods (refs. C44-8151 and C44-8152) complete with their respective individual parts listings. This reference material is indispensable for accurate identification, ordering, and replacement of components during repair and maintenance operations.